If available, perhaps try a different device BT paired with your Move 2 and just see if that changes anything. It might rule out a few things if it then does/doesn’t work.

I would also try the setup with different Apps and in a different room and keep the mobile device about 3ft-6ft away from the speaker, to see if a different environment makes any difference, as it might be something in close proximity to the speaker/mobile that’s interfering with the signal.